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The current "cultural turn" in the study of social movements has produced a number of concepts formulating the cultural-symbolic dimension of collective actions. This proliferation, however, has resulted in some confusion about which cultural-symbolic concept is best applied to understanding cultural processes involved in social movements. We articulate a new definition of ideology that makes it an empirically useful concept to the study of social-movement mobilization. It is also formulated as autonomous of concepts such as culture and hegemony and of other cultural-symbolic concepts presently used in the movement literature to explain participant mobilization. We demonstrate the usefulness of our ideology concept by analyzing letters written to Martin Luther King, Jr. from segregationists opposed to the integration of American society. The analysis indicates that the letter writers particularized segregationist culture, creating ideologies that fit their structural, cultural, and immediate circumstances, and that the ideologies they constructed thereby acted to mobilize their countermovement participation. The particularizing resulted in four differentiated ideological versions of segregationist culture. The empirically acquired variety of ideological versions is inconsistent with the role attributed to cultural-symbolic concepts in the social-movement literature and requires theoretical clarification. We conclude with a discussion of the theoretical implications for social-movement theory of the variety of segregationist ideologies.

Objectives In effort to improve chest compression quality among health care providers, numerous feedback devices have been developed. Few studies, however, have focused on the use of cardiopulmonary resuscitation feedback devices for infants and children. This study evaluated the quality of chest compressions with standard team-leader coaching, a metronome (MetroTimer by ONYX Apps), and visual feedback (SkillGuide Cardiopulmonary Feedback Device) during simulated infant cardiopulmonary resuscitation. Methods Seventy voluntary health care providers who had recently completed Pediatric Advanced Life Support or Basic Life Support courses were randomized to perform simulated infant cardiopulmonary resuscitation into 1 of 3 groups: team-leader coaching alone (control), coaching plus metronome, or coaching plus SkillGuide for 2 minutes continuously. Rate, depth, and frequency of complete recoil during cardiopulmonary resuscitation were recorded by the Laerdal SimPad device for each participant. American Heart Association–approved compression techniques were randomized to either 2-finger or encircling thumbs. Results The metronome was associated with more ideal compression rate than visual feedback or coaching alone (104/min vs 112/min and 113/min; P = 0.003, 0.019). Visual feedback was associated with more ideal depth than auditory (41 mm vs 38.9; P = 0.03). There were no significant differences in complete recoil between groups. Secondary outcomes of compression technique revealed a difference of 1 mm. Subgroup analysis of male versus female showed no difference in mean number of compressions (221.76 vs 219.79; P = 0.72), mean compression depth (40.47 vs 39.25; P = 0.09), or rate of complete release (70.27% vs 64.96%; P = 0.54). Conclusions In the adult literature, feedback devices often show an increase in quality of chest compressions. Although more studies are needed, this study did not demonstrate a clinically significant improvement in chest compressions with the addition of a metronome or visual feedback device, no clinically significant difference in Pediatric Advanced Life Support–approved compression technique, and no difference between compression quality between genders.

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